Ejector pump conveyance of material



1957 K. VON HAKEN EJECTOR PUMP CONVEYANCE OF MATERIAL Filed Jan. '7, 1953 INVENTOR. KURD VQN HAKEN, M a M H/S AGENTS.

United States Patent 2,778,318 EJECTOR PUMP CONVEYAN CE F MATERIAL Kurd von Haken, Murnau, Upper Bavaria, Germany, assignor of one-half to Kenneth R. Marsden, Chicago, Ill

Application January 7, 1953, Serial No. 330,152 Claims priority, application Germany February 8, 1952 2 Claims. (Cl. 103-262) The invention relates to an ejector type pump for the conveyance of granular, powdery, or fluid substances, or mixtures thereof.

With the above and other objects of the invention in view, the invention consists in the novel methods, construction, arrangement and combination of various devices, elements and parts, as set forth in the claims hereof, one embodiment of the same being illustrated in the accompanying drawings and described in the specification.

For a fuller understanding of the nature and objects of the invention reference should be had to the following description, taken in connection with the accompanying drawings, wherein:

Figure 1 is a plan view of a pump of the ejector type in accordance with the invention, with the impeller casing in section taken on line 1--1 of Figure 2;

Figure 2 is a longitudinal sectional view taken on line 2-2 of Figure l; and

Figure 3 is a cross sectional view, of the tubular structure of the pump of the preceding views, taken on line 33 of Figure 2.

Referring now particularly to Figure 2, there is provided a tubular structure or tube generally indicated at 11. The structure 11 has a cylindrical section 12 which is surmounted by a tapered section forming a funnel 13 integral with the section 12, and a discharge section 14 of reduced diameter and which is integrally connected to the section 12 opposite relative to the funnel 13. A stationary cylindrical member 16 is disposed concentrically on the interior of the tube 11, and an annular chamber 17 is formed between the interior surface of the cylindrical section 12 and the outer surface of the cylindrical member 16. Radial vanes 18 are secured to the cylindrical member 16 and to the section 12, and are equally angularly spaced from each other about the axis of the tube 11, throughout the annular chamber 17, and form passages 19. Each passage 19 has segmental shape and is parallel to the other passages 19 and to the axis of the tube 11.

A cavity 21 is formed in the tube 11 above the vanes 18, for the admission into the annular chamber 17 of material 22 which is drawn in through the funnel 13 from the exterior in direction of the arrow A.

A casing 23 is supported in the funnel 13 co-axially with the section 12 and is spaced above the upper end of the vanes 18 at a distance corresponding to the height of the cavity 21. The casing 23 is cylindrical and has at its top a stationary inlet pipe 24 and in the interior an impeller 26 which is journalled in the casing for rotation about the axis of the casing 23 which axis coincides with that of the tube 11.

The impeller 26 may be journalled on a bearing 27 which is supported on a fixed rod 28; the latter is supported by the stationary cylindrical member 16. The impeller 26 has conduit-forming blades 29. As shown in Figures 1 and 2, there may be two separate conduits 31 and 32 formed by the blades 29. Each of the conduits extends from an upper section which is rotatably sealed to the inlet pipe 24 by a packing 33, and each conduit extends downwardly annularly, and terminates in a nozzle 34. Each nozzle 34 is inclined at an angle B to the horizontal, but each nozzle terminates in a horizontal lower surface 36 that intersects the blades 29 and forms therewith a nozzle opening 37. The curvatures of the blades 29 are so arranged that the nozzle openings 37 will in all positions be located opposite the passages 19; each opening 37 has a segmental shape that is similar to a portion of the cross-sectional shape of each passage 19, as clearly shown in Figure 1.

Therefore, when fluid is passed through the pipe 24 into the impeller 26, it will be forced by the impeller to flow about its axis and will be ejected from the nozzles 34; the fluid will stream across the cavity 21 and strike the vanes 18 at a composite angle of which one component will be complementary to the angle B. At any one moment during the rotation, each nozzle opening 37 will discharge fluid into one or more, but in the illustrated example not more than two, of the passages 19, while at this moment the other passages 19 will not receive any fluid discharge directly from any nozzle. Thereby, during the rotation, each passage 19 will intermittently receive a momentary jet discharge from the nozzles 34.

A rotatable horizontal flange 38 may be attached to the blades 21 and be in alignment with the nozzle openings 37, and be rotatably sealed by means of a packing 39 to the lower side of the casing 23. By this arrangement, the nozzle openings 37 and the blades 29 will be protected from every impact from the material 22 which enters through the funnel 13 and is drawn into the cavity 21, and then pushed through the passages 19, by the action of the fluid expelled from the impeller 26 through the nozzles 34.

The casing 23 may be supported from the tube 11, for instance, by means of supporting ribs 41 that extend between the side of the casing 23 and the funnel 13 and which permit the passage of the material 22 with but little obstruction.

The cross-section of the nozzles 31 is made larger than the cross-section of passage 19 so that the shape of the nozzle openings 37 will conform to at least a portion of the shape of passage 19. Inasmuch as the casing 23, together with the rotatable flange 38, seals the interior of the device and thereby the impeller 26 from contact with the material 22, any special lining of the blades, such as is often encountered in screw-type conveyors, may be dispensed with entirely.

The operation of the above described embodiment of the invention is, as follows.

Fluid, such as for instance water or compressed air enters the impeller 26 through the inlet pipe 24. The impeller will rotate in direction C and thereby distribute the fluid about the impeller axis. The fluid will be discharged in a stream forming an angle with the horizontal from the terminal nozzles 34 of the fluid conduits 31 and 32 of the impeller 26, and will be ejected across the cavity 21 into the passages 19, intermittently entering succeeding passages of the annular chamber 17.

By this action of the fluid, the material 22 will be continuously drawn from the funnel 13 into the cavity 21 and be propelled in direction D through the passages 19.

It will be apparent to those skilled in the art that the novel principles of the invention disclosed herein in connection with specific exemplifications thereof will suggest various other modifications and applications of the same. It is accordingly desired that in construing the breadth of the appended claims they shall not be limited to the specific exemplifications of the invention described herein.

Having thus described the invention, what I claim as new and desire to be secured by Letters Patent, is as follows:

1. In a pump of the ejector type for use in conveying a material flow, in combination, a stationary Wall structure comprising a tubular section, a stationary cylindrical member concentrically disposed within and spaced from the interior of said tubular section and defining with the interior surface of said Wall thereof an annular chamber, a plurality of stationary radial vanes secured in said chambet and each extending between said member and said surface, said vanes being angularly spaced from each other throughout said chamber forming a series of parallel passages, a stationary casing supported co-axially near said chamber and being spaced from the end of said vanes defining in said structure a cavity, said casing having a fluid inlet opening, an impeller disposed in said casing and being journalled for rotation about the axis of said casing and including curved blades extending to said inlet opening and forming at least one nozzle terminating adjacent said cavity and opposite said passages, said nozzle being inclined at an angle to said vanes, whereby said impeller is rotated by reaction of the fluid flowing between said blades and striking said vanes after discharge from said nozzle and fluid will continuously be discharged from said nozzle into said cavity and be intermittently discharged into each passage, and an extension formed on said structure near said cavity and operable to admit material from the exterior into said cavity for continuous conveyance thereof through said passages by the action of said fiuid.

2. In a pump as claimed in claim 1, said blades of said impeller forming a plurality of separate conduits each including a nozzle, and each nozzle being in all positions inclined at an angle relative to said vanes.

La Fore Nov. 28, 1911 Petermoller May 6, 1913 

